(57) The apparatus for controlling, in a power failure, a rotary press (Fig.1) that separately
drives a printing section (CT1,CT2) and a folding section (FD) with independent drive
sources (M), pulls a printing material (W) that is being braked in a paper feeding
section (SP1,SP2) at least by the folding section, brings a blanket cylinder (BC)
of the printing section into contact with the printing material to produce printing
impressions by changing over the braking of the printing material to a braking mode
with a constant braking force upon interruption of power feeding due to a main power
failure, detecting a voltage drop caused by the power failure to output a power failure
signal, changing over to a battery power supply (12), separating a blanket cylinder
that is at press from the printing material, and decelerating and bringing to a halt
a printing material pulling mechanism (OT) at the folding section within a predetermined
time.
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